A study of mechanical equipment used to open, blend and clean the raw materials and to prepare cotton and other staple fibres for succeeding yarn manufacturing processes. Blending of staple fibers: calculation of drafts ; measuring devices, wastes, evener motion and production. A study of the theory and operation of the cotton and other staple fibres.
Card construction, setting, clothing, drafts and production. A study of the drawing machine construction; ratio of speed, doubling, production and draft calculation. Study of settings and adjustment of the comb its preparatory machines; the value and use of its product. Timing and setting of the comb for various staples and required waste, production and other calculation, management, and operation of this machines.